Dominion Energy, Inc. produces and transports energy in the United States. The company's Power Delivery segment engages in the regulated electric transmission and distribution operations that serve residential, commercial, industrial, and governmental customers in Virginia and North Carolina. Its Power Generation segment is involved in the electricity generation activities through gas, coal, nuclear, oil, renewables, biomass, hydro, solar, and power purchase agreements; and related energy supply operations. It also comprises generation operations of the company's merchant fleet and energy marketing, and price risk management activities for its assets. The company's Gas Infrastructure segment engages in the regulated natural gas distribution, gas transmission pipeline and storage, liquefied natural gas, and nonregulated retail natural gas marketing operations, as well as natural gas gathering and processing activities. This segment serves residential, commercial, and industrial customers. As of December 31, 2017, the company's portfolio of assets included approximately 26,000 megawatts of generating capacity; 6,600 miles of electric transmission lines; 57,900 miles of electric distribution lines; 14,800 miles of natural gas transmission, gathering, and storage pipelines; and 51,800 miles of gas distribution pipelines. It served approximately 6 million utility and retail energy customers; and operated underground natural gas storage systems with approximately 1 trillion cubic feet of storage capacity. In addition, Dominion Energy, Inc. sells electricity at wholesale prices to rural electric cooperatives, municipalities, and into wholesale electricity markets. The company was formerly known as Dominion Resources, Inc. and changed its name to Dominion Energy, Inc. in May 2017. Dominion Energy, Inc. was founded in 1909 and is headquartered in Richmond, Virginia.